Re: [PSUBS-MAILIST] Jane article on current submarine development.

["SHinzey" <ghambit7@gmail.com>]

    Interesting read, but I tend to raise an eyebrow when anyone says 
"shaftless propulsion."  In truth (as far as I know), it doesnt exist except 
in a hypothetical "pulsejet" type water jet and in systems that mimic nature 
(like the "shark-tail" drive) utilizing some kind of artificial muscle. 
I've seen vids. of the shark-tail work in a wave tank; extremely interesting 
(runs by electrically stimulated artificial muscle fibre).  And the water 
jet exists also in a PWC scale I believe, but only as a power boost to the 
main drive.
    Anyways, "mermaid drives" (which is what this article is referring too) 
have been around for many years.  Many modern ships use them actually and 
even some old ones have some form of it.  It's nothing even remotely cutting 
edge, but it's nice to see them try to adopt it on subs.  Even if they were 
to implement a type of "outrunner" system where the motor itself serves as 
the shaft, it's still a shaft though... u cant have an electromagnetic motor 
w/o one.
----- Original Message ----- 
From: "Ian Roxborough" <irox@ix.netcom.com>
To: <personal_submersibles@psubs.org>
Sent: Sunday, March 25, 2007 12:51 AM
Subject: [PSUBS-MAILIST] Jane article on current submarine development.


> Geared towards military subs, but I think it's relavent for
> home builders as well:
>  http://www.janes.com/defence/naval_forces/news/jni/jni070323_1_n.shtml
>
> - Elimate direct drive.
>   + no prop shaft.
>   + no dedicated engines for propulsion.
>   + cleaner exterior and interior.
>
> - Elimate hydraulics (internal and external).
>   +  I'm guessing the a noise and maintenance advantage.
>
>
>
>
> ************************************************************************
> ************************************************************************
> ************************************************************************
> The personal submersibles mailing list complies with the US Federal
> CAN-SPAM Act of 2003.  Your email address appears in our database
> because either you, or someone you know, requested you receive messages
> from our organization.
>
> If you want to be removed from this mailing list simply click on the
> link below or send a blank email message to:
> removeme-personal_submersibles@psubs.org
>
> Removal of your email address from this mailing list occurs by an
> automated process and should be complete within five minutes of
> our server receiving your request.
>
> PSUBS.ORG
> PO Box 53
> Weare, NH  03281
> 603-529-1100
> ************************************************************************
> ************************************************************************
> ************************************************************************




************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
	removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.

PSUBS.ORG
PO Box 53
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************